ACCESS修改密码,更新显示

  public partial class 修改用户信息frm : Form
    {
        public 修改用户信息frm()
        {
            InitializeComponent();
        }

        public string username = "";
        public string newpaw ="";//密码
        public string newpawagi ="";//确认密码
        public  string myconnstring = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=ErLake.mdb";

        private void 修改用户信息frm_Load(object sender, EventArgs e)
        {

            loadtable();

        }
        public void loadtable()
        {
            DataTable mytableall = new DataTable();
            string mysqlall = "select * from tb_admin";
            OleDbDataAdapter da = new OleDbDataAdapter(mysqlall, myconnstring);
            da.Fill(mytableall);
            dataGridView1.DataSource = mytableall;
        }

        //添加选择行改变时，获取行号处理

        private void dataGridView1_SelectionChanged(object sender, EventArgs e)
        {
            this.dataGridView1.SelectionMode = DataGridViewSelectionMode.FullRowSelect;
            if (this.dataGridView1.SelectionMode!=DataGridViewSelectionMode.FullColumnSelect)
            {
                int rowindex = dataGridView1.CurrentRow.Index;//获取选中的行号
                textBox1.Text = dataGridView1.Rows[rowindex].Cells[].Value.ToString();
                //textBox2.Text = dataGridView1.Rows[rowindex].Cells[1].Value.ToString();
                //textBox3.Text = dataGridView1.Rows[rowindex].Cells[2].Value.ToString();
                textBox2.Focus();//

            }
        }

        private void 修改_Click(object sender, EventArgs e)
        {

            username=textBox1.Text;//用户名
            newpaw = textBox2.Text;//获取密码
            newpawagi = textBox3.Text;//获取密码
            if (newpaw != newpawagi)
            {
                MessageBox.Show("两次密码不一致！", "提示", MessageBoxButtons.OKCancel, MessageBoxIcon.Information);
            }
            else
            {
                string sqlcmd = "update tb_admin set 密码 = '"+newpaw+"' where 用户名='"+username+"'";//更新
                OleDbConnection myconn = new OleDbConnection(myconnstring);
                myconn.Open();
                OleDbCommand mycomm = new OleDbCommand(sqlcmd,myconn);
                mycomm.ExecuteNonQuery();
                MessageBox.Show("密码修改成功！", "提示", MessageBoxButtons.OKCancel, MessageBoxIcon.Information);
                loadtable();//加载表
            }

        }

        private void button2_Click(object sender, EventArgs e)
        {
            this.Close();
        }
    }